I run a price comparison website for a small niche at http://cdkeyprices.com I am targeting keywords for the specific products I am comparing the price/merchants on. On a typical page I would have a price column, product name, the merchant and a buy button. Buy button is affiliate linked to the merchant. The product name in the product column is the name from the actual website I am tracking. As such, my keyword was appearing sometimes up the 30 times. I've took it down some months ago but was wondering if this was a bad move. I was concerned Google would think I was stuffing the keyword. I've only just gotten into SEO the past few months so was not able to  see any changes. Should i put the product column back up or would it be considered over optimization?